C-Series Book - Industrial Engine Service

6
3. Adjustment
Proper adjustment of the clutch actuator is
critical to operation and to ensure longevity
of the clutch and actuator. The intent of
the design and the goal of the adjustment
process is for the clutch to engage when
the actuator is on its outward stroke and the
two linkage bars become in line with each
other. (Excessive binding in the linkage
can cause damage to the clutch and/or
the actuator.) After the clutch engages, the
actuator should continue to travel outward,
allowing the slotted linkage to relieve the
engagement pressure on the clutch.
While the actuator is in the fully retracted,
disengaged position, the shoulder bolt in the
splined lever joint should be approximately
centered in the slot of the linkage bar. Once
the actuator is fully extended and the clutch
is in the engaged position, the shoulder bolt
in the splined lever joint should, again, be
approximately centered in the slot of the
linkage bar (such that any force is removed
from the clutch shaft).
The splined lever should be positioned
initially, as near vertical (pointed downward)
as possible, with the clutch disengaged.
The base bracket should begin with the
bolt securing it to the base positioned
approximately in the center of the slot and
fully tightened so that the base bracket
does not move during clutch engagement/
disengagement (recommended 180-200 ftlbs
for ¾ grade 5 fasteners; 250-270 ft-lbs
for 7/8 grade 5 fasteners).
24 C-SERIES SERVICE, OPERATION & PARTS MANUAL – AEPB1 1-800-331-3662